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What's the difference between an object initializer and a constructor?
...re parameters, and are used to create and initialize an object before the calling method gets the handle to the created object. For example:
MyObject myObjectInstance = new MyObject(param1, param2);
In this case, the constructor of MyObject will be run with the values param1 and param2. These ar...
Dynamic Sorting within SQL Stored Procedures
...ed by modern RDBMS solutions but as yet I have not found anything that really addresses what I see to be an incredibly common need in any Web or Windows application with a database back-end.
...
Replace a value if null or undefined in JavaScript
... boolean value but the first value that can be converted to true.
Additionally use an array of objects instead of one single object:
var options = {
filters: [
{
name: 'firstName',
value: 'abc'
}
]
};
var filter = options.filters[0] || ''; // is {n...
Method chaining - why is it a good practice, or not?
... object methods returning the object itself in order for the result to be called for another method. Like this:
18 Answers
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What is reflection and why is it useful?
... say you have an object of an unknown type in Java, and you would like to call a 'doSomething' method on it if one exists. Java's static typing system isn't really designed to support this unless the object conforms to a known interface, but using reflection, your code can look at the object and fin...
How do I parse JSON with Ruby on Rails? [duplicate]
...similarity of the [] method.
Here are some examples:
hash_of_values = {'foo' => 1, 'bar' => 2}
array_of_values = [hash_of_values]
JSON[hash_of_values]
# => "{\"foo\":1,\"bar\":2}"
JSON[array_of_values]
# => "[{\"foo\":1,\"bar\":2}]"
string_to_parse = array_of_values.to_json
JSON[...
Java equivalent to Explode and Implode(PHP) [closed]
...
Thanks u guys for all your answers .
– Pankaj Wanjari
May 28 '13 at 5:55
1
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difference between #if defined(WIN32) and #ifdef(WIN32)
...
#ifdef FOO
and
#if defined(FOO)
are the same,
but to do several things at once, you can use defined, like
#if defined(FOO) || defined(BAR)
share
...
Convert xlsx to csv in Linux with command line
...
The Gnumeric spreadsheet application comes with a command line utility called ssconvert that can convert between a variety of spreadsheet formats:
$ ssconvert Book1.xlsx newfile.csv
Using exporter Gnumeric_stf:stf_csv
$ cat newfile.csv
Foo,Bar,Baz
1,2,3
123.6,7.89,
2012/05/14,,
The,last,Line
...
How to do a PUT request with curl?
...
"man curl" on -X: "Normally you don't need this option. All sorts of GET, HEAD, POST and PUT requests are rather invoked by using dedicated command line options." But I couldn't find another way.
– Martin C. Martin
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